40304223-epabx (1)

7/29/2019 40304223-EPABX (1)

1/35

1

Click to edit Master title style

1

EPABXPresented by

Tijo M J

Class No.32

MTI Thrissur

7/29/2019 40304223-EPABX (1)

2/35

2


2

E-Electronic

P-Private

A-Automatic

B-Branch

X-Exchange

7/29/2019 40304223-EPABX (1)

3/35

3


3

EPABX

EPABX stands for electronic private automatic

branch exchange. It is an electronic switching

device whose basic function is internal &

external communication with PSTN. Itsconfiguration tells us about its connecting

capacity with C.O line & subscribers for e.g. .

EPABX 308 means one can convert 3 telephone

lines and 08 subscribers to EPABX. Telephone line

connected3 Numbers of

subscribers connected08

7/29/2019 40304223-EPABX (1)

4/35

4


4

EPABX 308

P&T lines

27 28 29

Subscriber

30 31 32 33 34 35 36 37

7/29/2019 40304223-EPABX (1)

5/35

5


5

History

The term PBX was first applied

when switchboard operators ran

company switchboards by hand.As automated electromechanical and

then electronic switching systems

gradually began to replace the manualsystems, the terms PABX (private

automatic branch exchange)
http://en.wikipedia.org/wiki/Switchboard_operatorhttp://en.wikipedia.org/wiki/Switchboard_operator

7/29/2019 40304223-EPABX (1)

6/35

6


6

and PMBX (private manual branch

exchange) were used to differentiate them.

Solid state digital systems were sometimes

referred to as EPABXs (electronic private

automatic branch exchange). Now, the term

PBX is by far the most widely recognized.

7/29/2019 40304223-EPABX (1)

7/35

7


7

The acronym is now applied to all types of

complex, in-house telephony switching

systems, even if they are

not private, branches, or exchanginganything.

7/29/2019 40304223-EPABX (1)

8/35

8


8

EPABX

EPABX stands for Electronic Private

Automated Branch Exchange, it is an

intelligent electronic equipment which

controls, provide telephone connectionlocally in a office premises.

7/29/2019 40304223-EPABX (1)

9/35

9


9

It has four basic parts

switching matrix, control, user terminals

and trunks

A term used synonymously with Electronic

Private Automated Branch Exchange

(EPABX) and Private Automated Branch

Exchange (PABX). Similar to a central

office exchange but smaller.

7/29/2019 40304223-EPABX (1)

10/35

10


10

EPABX

7/29/2019 40304223-EPABX (1)

11/35

11


11

A central off exchange can accommodate

10,000 subscribers. PBX systems are

typically designed to accommodate from 20

to 10,000 subscribers or station

7/29/2019 40304223-EPABX (1)

12/35

12


12

EPABX block diagram

7/29/2019 40304223-EPABX (1)

13/35

13


13

PROGRAMMING OF EPABX

C.O (Central office) line status

C.O line grouping

C.O type

C.O line access

Call landing

Reserved incoming line

Direct access Programming of EPABX is simply done

through keyboard cords.

7/29/2019 40304223-EPABX (1)

14/35

14


14

C.O LINE GROUPING

The C.O lines can be divided in two

groups if required & different extensions

can be allowed to access different type of

C.O lines. The C.O lines of different group

are accessed by 0&9 respectively.

7/29/2019 40304223-EPABX (1)

15/35

15


15

C.O (central office) line access group

access

This program is used to control the accessto zero group or nine group or both.

Zero group for subscribers:- This program isused to control the access to zero groupfor subscribers weather subscriber isallowed to pick zero group telephone linesor not this is decided by this program.

7/29/2019 40304223-EPABX (1)

16/35

16


16

No Access:-Access:-

Nine group access:- This program is used to

control the access to nine group forsubscribers weather subscriber is allowed to

pick nine group telephone lines or not this is

decided by this program.

7/29/2019 40304223-EPABX (1)

17/35

17


17

CALL LANDING

You can set different modes of incoming

C.O calls for each C.O lines

independently.

The incoming C.O calls rings in round

robin sequence at up to four

preprogrammed extensions.

7/29/2019 40304223-EPABX (1)

18/35

18


18

30

3132

33

CALL LANDING

7/29/2019 40304223-EPABX (1)

19/35

19


19

NIGHT RINGING

We can program desired extension to

receive incoming call in night time when

there is no operator sitting. All the lines will

have same landing point and sequence byusing program.

Shifting day/night mode:-P.W+100/101

for day/night. (Name of a Programme)

7/29/2019 40304223-EPABX (1)

20/35

20


20

RESERVED INCOMING LINE

This program is used to dedicate particular coline for incoming calls only reserved line willnot be selected for outgoing call from anysubscriber. This can be done using the a

program.e.g.

P.W+21+TRK+0/1

TRK:-27,28,290:-only incoming

1:- both way working

7/29/2019 40304223-EPABX (1)

21/35

21


21

DIRECT ACCESS

This program enables access of C.O lines

just by dialing address only . 0 or 9 access

should be disable before activating this

program. This can be done using followingprogram.

P.W +57+EXTN+0/1

0:- Direct access is off

1:- Direct access is on

7/29/2019 40304223-EPABX (1)

22/35

22


22

PICK UP GROUP

To set different pick up group for picking of

call one extension can not be part of two

group. This can be done using following

program

P.W + 53 + EXTN + 0-----9

0-----9

7/29/2019 40304223-EPABX (1)

23/35

23


23

EXTENSION OUT OF SERVICE

To set particular Extension out of service

or in service.

P.W +50+EXTN+0/1

0:- out of service

1:- in service

7/29/2019 40304223-EPABX (1)

24/35

24


24

BARGE IN TONE

This is program is used to set barge in

tone off or on. This can be done using

following program.

P.W+54+EXTN+0/1

0: off

1: on

7/29/2019 40304223-EPABX (1)

25/35

25


25

MAIN PARTS OF EPABX

SLIC subscriber line interface card

CO Line Interface

CPU Switches

Power Supply

7/29/2019 40304223-EPABX (1)

26/35

26


26

subscriber line interface card

A line card ordigital line card is a modular

electronic circuit on a printed circuit

board that interfaces with

a telecommunicationsaccess network.
http://en.wikipedia.org/wiki/Printed_circuit_boardhttp://en.wikipedia.org/wiki/Printed_circuit_boardhttp://en.wikipedia.org/wiki/Telecommunicationshttp://en.wikipedia.org/wiki/Access_networkhttp://en.wikipedia.org/wiki/Access_networkhttp://en.wikipedia.org/wiki/Access_networkhttp://en.wikipedia.org/wiki/Telecommunicationshttp://en.wikipedia.org/wiki/Printed_circuit_boardhttp://en.wikipedia.org/wiki/Printed_circuit_board

7/29/2019 40304223-EPABX (1)

27/35

27


27

Command-line interface

A command-line interface (CLI) is a

means of interaction with a computer

program where the user(orclient) issues

commands to the program in the form ofsuccessive lines oftext (command lines).
http://en.wikipedia.org/wiki/Computer_programhttp://en.wikipedia.org/wiki/Computer_programhttp://en.wikipedia.org/wiki/User_(computing)http://en.wikipedia.org/wiki/Client_(computing)http://en.wikipedia.org/wiki/Plain_texthttp://en.wikipedia.org/wiki/Plain_texthttp://en.wikipedia.org/wiki/Client_(computing)http://en.wikipedia.org/wiki/User_(computing)http://en.wikipedia.org/wiki/Computer_programhttp://en.wikipedia.org/wiki/Computer_program

7/29/2019 40304223-EPABX (1)

28/35

28


28

CPU

CPU ( Central Processing unit) which

controls all switching activities, routing of

calls, call logging, connect, disconnect etc.

It performs all the logic and normallycontrolled by a power MCU ( Micro

Controller Unit)

7/29/2019 40304223-EPABX (1)

29/35

29


29

Switches

Access category for night service

ACS (Alternative Carrier Selection)

Alarm announcement

Association of caller number with Hi Path

Auto attendant with announcement

Auto hands free activation Deactivation on key sets

Baby phone/paging with ext. access

P

S l

7/29/2019 40304223-EPABX (1)

30/35

30


30

PowerSupply

Switch Mode Power Supply is used in this

system

The system needs regulated power supply

for micro controller.

Advantages

7/29/2019 40304223-EPABX (1)

31/35

31


31

Advantages

24/7 maintenance

Cheaper service work

Communication-related disasters arehandled by the hosting provider

Companies can focus more on their

business activities and goals

7/29/2019 40304223-EPABX (1)

32/35

32


32

Low initial investment

Maintenance and upgrades are taken careof by the hosting provider

7/29/2019 40304223-EPABX (1)

33/35

33


33

Disadvantages

Extra cost for added features

Included features are limited

Limited flexibility of users Monthly fees

Phone system service is as good as the

provider

7/29/2019 40304223-EPABX (1)

34/35

34


34

Conclusion

One of the latest trends is the VoIP PBX,

also known as an IP-PBX orIPBX, which

uses the Internet Protocol to carry calls

Even though VoIP gets a great deal of

press, the old circuit switched network is

alive and well, and the already bought

PBX's are very competitive in serviceswith modern IP Centrexes. Currently, there

are four distinct scenarios in use
http://en.wikipedia.org/wiki/VoIPhttp://en.wikipedia.org/wiki/IP_PBXhttp://en.wikipedia.org/wiki/Internet_Protocolhttp://en.wikipedia.org/wiki/Circuit_switchedhttp://en.wikipedia.org/wiki/Circuit_switchedhttp://en.wikipedia.org/wiki/Internet_Protocolhttp://en.wikipedia.org/wiki/IP_PBXhttp://en.wikipedia.org/wiki/IP_PBXhttp://en.wikipedia.org/wiki/IP_PBXhttp://en.wikipedia.org/wiki/VoIP

7/29/2019 40304223-EPABX (1)

35/35

35


35

40304223-epabx (1)

Documents